Machine for treating, especially for washing sand, gravel, stone, and similar material



Feb. 4, 1941. HAVER 2,230,325

r F. MACHINE FOR TREATING, ESPECIALLY FOR WASHING SAND, GRAVEL, STONEAND SIMILAR MATERIAL Filed Jan. 30, 1939 Patented Feb. 4, 1941 UNITEDSTATES PATENT FFIE' WASHING SAND, GRAVEL, STONE, SIMILAR MATERIAL ANDFritz Havel, Oelde, Westphalia, Germany Application January 30, 1939,Serial No. 253,653 In Germany February 3, 1938 2 Claims.

The invention relates to a driving device for a machine for treating,especially for washing, grinding and mixing, sand, gravel, stone andsimilar material, with trough-shaped or tubular 5 members that swing inthe transverse plane in circuit paths.

According to German specification 628,551, there is known a machine thatpossesses a member which swings in the transverse plane and in the caseof which the material to be treated is admitted into one or moretroughs, which impart a helical forward movement to the material duringthe swinging. In this way, it has become possible to work in continuousoperation, since the material, which is supplied to one end of thetrough, automatically makes for the outlet.

However, machines according to German specification 628,551 are limitedas regards their working length. This working length correspondsapproximately to the distance between the right-hand and left-handbearings I6 which are connected with each other by the shaft I. Thisshaft rotates freely between the two bearings and has a certaindeflection on account of its great speed and load. This deflectionexerts oblique pressures on the roller bearing I6 and should not begreater than is allowed by the tolerances of the bearing. Consequently,in the case of swinging machines, the distance between the two bearingscannot, according to experience, be greater than about 2000 mms. In thecase of the known swinging screens, which are equipped with the samedrive as is the machine according to German specification 628,551, thislimitation is not so noticeable, since the bearings limit the workingwidth, whilst the working length should, without danger, amount to threeto six times the working width. However, the machine according to Germanspecification 628,551 has, as its working length, only the measurementof the distance between the side walls it).

According to the invention, the limitation of the working length isremoved by reason of the fact that the working machines, which mostlyconsist of a trough or a tubular member, are provided with two headbearings which work independently of each other and which are made toswing by means of eccentrics or by means of flywheels.

The invention is illustrated by way of example by the accompanyingdrawing.

Figure 1 shows a machine according to the invention in front elevation.The trough II has, on the right and left, bearings l6 respectively eachof which has a piece of shaft l5 borne in two external bearings I 4which are carried by the frame H2. The shaft, which is provided witheccentrics, carries, between the bearings, a flywheel which is adjustedto the swinging mass. 5 The trough is supported throughout its wholelength by elastic means-e. g., helical springs l8.

Figure 2 shows the plan of the same machine.

According to Figure 3, the elastic means l8 can be fitted above andbelow the trough.

Figure 4 shows the construction of a head hearing in its details. Theshaft I5 is located, with the ball head 38 and the bearings 16, in theend wall lb of the trough. The shaft is supported on the outside on theframes l2 and I2 in the bear- 15 ings l4 and it. The flywheel I! is,with its adjustable weight til, located between inside and outsidebearings. The shaft receives its movement of rotation from the drivingpulley 4| which may be in the form of a smooth or wedge-grooved pulleyand, for the purpose of improving the output, may be in the form of aflywheel. If the machine is .to be swung only by inertia masses, thebearing construction is simplified in the known manner. Instead of theball head, any 25 other bearing-e. g., a roller bearing withselfadjustment or an elastic bearing-can be employed.

In order to compel equal circular swings or 30 equal swings that aresimilar to circles, the two head bearings must be entirely equal. Thetwo bearings are driven either through a shaft with equal drivingpulleys which is located on the outside of the machine or by means oftwo like elec- 35 tromotors, which can be started equally advantageouslyfrom one position. The driving means have not been represented.

On starting the machine, it is first of all found that every bearingside swings the machine independentlyi. e., the circle of swing on theright leads the circle on the left or conversely. In this way, a pointmovement is produced in the centre of the machine. This is representedin Figure 5. The points a lie opposite each other on the right 45 andleft. The same is the case with regard to the points b. Consequently,the machine will not perform any circular swings at 0. However, aftersome time, the circles of swing are mutually equal to each other. Themachine runs exactly as if 50 the two hearings were connected with eachother by means of a rigid shaft. This is represented in Figure 6. Thisoperation is explained by the fact that the swinging machine stores upso much of its own energy that it can be regarded as an in- 55 dependentsource of production of the swings. By means of the drive at the twoends, only as much energy is supplied to it as it requires for keepingthe swings constant. In this way, the small energy requirement ofelastically supported swinging bodies is explained in the known manner.One drive of the machine can even be temporarily disconnected without atonce causing trouble. The circle of swing, however, diminishes graduallyon the undriven side and also remains behind in its velocity. Themachine may also be swung only at one end .eccentrically or by means ofinertia masses and the opposite end may be mounted centrically. In thatcase, a swinging as shown in Figure 7 would result.

By means of the invention, it has become possible to give gutters forswinging washers, drums for swinging mills, coolers etc., a workinglength that is a multiple of the working length disclosed by Germanspecification 628,551.

What I claim is:

1. A machine for treating, such as washing, sand, gravel, rock andsimilar material, comprising a trough-shaped member, bearings on saidmember, aligned driving shafts for said member journaled in said bearingand said bearings being eccentrically positioned with respect to therotating axes of said shafts and separated and movable independently ofone another so that said member may swing circularly in a transverseplane.

2. A machine for treating, such as Washing, sand, gravel, rock andsimilar material, comprising a trough-shaped member, spaced bearingsconnected to the end walls of said trough-shaped member, driving shaftsfor said member journaled in said bearings, and a universal jointbetween said bearings and said shafts, said universal I joints beingeccentric with respect to the rotating axes of said shaftslso that saidmember may 20 swing circularly in a transverse plane.

FRITZ HAVER.

